<!DOCTYPE html>
<html>

<head>
    <title>加一Demo</title>
    <meta charset="UTF-8" />
</head>

<body>
    <div id="app"></div>
    <script src="https://cdn.bootcss.com/react/16.10.2/umd/react.development.js"></script>
    <script src="https://cdn.bootcss.com/react-dom/16.10.2/umd/react-dom.development.js"></script>

    <script src="./main.js"></script>
</body>

</html>